From 5f8f3adaf7cc01a161092ea272f50279a7ad971a Mon Sep 17 00:00:00 2001
From: lilo_booter <lilo_booter@d19143bc-622f-0410-bfdd-b5b2a6649095>
Date: Sat, 28 Aug 2004 18:28:45 +0000
Subject: [PATCH] Tractor enhancements

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@395 d19143bc-622f-0410-bfdd-b5b2a6649095
---
 src/framework/mlt_multitrack.h |  1 +
 src/framework/mlt_playlist.c   |  3 +++
 src/framework/mlt_tractor.c    | 35 ++++++++++++++++++++++++++++++++++
 src/framework/mlt_tractor.h    |  3 +++
 4 files changed, 42 insertions(+)

diff --git a/src/framework/mlt_multitrack.h b/src/framework/mlt_multitrack.h
index 19ead699..809678c9 100644
--- a/src/framework/mlt_multitrack.h
+++ b/src/framework/mlt_multitrack.h
@@ -34,6 +34,7 @@ extern int mlt_multitrack_connect( mlt_multitrack self, mlt_producer producer, i
 extern mlt_position mlt_multitrack_clip( mlt_multitrack self, mlt_whence whence, int index );
 extern void mlt_multitrack_close( mlt_multitrack self );
 extern int mlt_multitrack_count( mlt_multitrack self );
+extern void mlt_multitrack_refresh( mlt_multitrack self );
 extern mlt_producer mlt_multitrack_track( mlt_multitrack self, int track );
 
 #endif
diff --git a/src/framework/mlt_playlist.c b/src/framework/mlt_playlist.c
index 1347a0e3..0e017ceb 100644
--- a/src/framework/mlt_playlist.c
+++ b/src/framework/mlt_playlist.c
@@ -89,6 +89,9 @@ mlt_playlist mlt_playlist_init( )
 		mlt_properties_set( mlt_playlist_properties( this ), "eof", "pause" );
 		mlt_properties_set( mlt_playlist_properties( this ), "resource", "<playlist>" );
 		mlt_properties_set( mlt_playlist_properties( this ), "mlt_type", "mlt_producer" );
+		mlt_properties_set_position( mlt_playlist_properties( this ), "in", 0 );
+		mlt_properties_set_position( mlt_playlist_properties( this ), "out", 0 );
+		mlt_properties_set_position( mlt_playlist_properties( this ), "length", 0 );
 
 		this->size = 10;
 		this->list = malloc( this->size * sizeof( playlist_entry * ) );
diff --git a/src/framework/mlt_tractor.c b/src/framework/mlt_tractor.c
index c07b7041..3dbc50bd 100644
--- a/src/framework/mlt_tractor.c
+++ b/src/framework/mlt_tractor.c
@@ -86,6 +86,9 @@ mlt_tractor mlt_tractor_new( )
 			mlt_properties_set( props, "resource", "<tractor>" );
 			mlt_properties_set( props, "mlt_type", "mlt_producer" );
 			mlt_properties_set( props, "mlt_service", "tractor" );
+			mlt_properties_set_position( props, "in", 0 );
+			mlt_properties_set_position( props, "out", 0 );
+			mlt_properties_set_position( props, "length", 0 );
 			mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
 			mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
 
@@ -142,6 +145,20 @@ mlt_multitrack mlt_tractor_multitrack( mlt_tractor this )
 	return mlt_properties_get_data( mlt_tractor_properties( this ), "multitrack", NULL );
 }
 
+/** Ensure the tractors in/out points match the multitrack.
+*/
+
+void mlt_tractor_refresh( mlt_tractor this )
+{
+	mlt_multitrack multitrack = mlt_tractor_multitrack( this );
+	mlt_properties properties = mlt_multitrack_properties( multitrack );
+	mlt_properties self = mlt_tractor_properties( this );
+	mlt_multitrack_refresh( multitrack );
+	mlt_properties_set_position( self, "in", 0 );
+	mlt_properties_set_position( self, "out", mlt_properties_get_position( properties, "out" ) );
+	mlt_properties_set_position( self, "length", mlt_properties_get_position( properties, "length" ) );
+}
+
 /** Connect the tractor.
 */
 
@@ -156,6 +173,24 @@ int mlt_tractor_connect( mlt_tractor this, mlt_service producer )
 	return ret;
 }
 
+/** Set the producer for a specific track.
+*/
+
+int mlt_tractor_set_track( mlt_tractor this, mlt_producer producer, int index )
+{
+	int error = mlt_multitrack_connect( mlt_tractor_multitrack( this ), producer, index );
+	mlt_tractor_refresh( this );
+	return error;
+}
+
+/** Get the producer for a specific track.
+*/
+
+mlt_producer mlt_tractor_get_track( mlt_tractor this, int index )
+{
+	return mlt_multitrack_track( mlt_tractor_multitrack( this ), index );
+}
+
 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 {
 	mlt_properties properties = mlt_frame_properties( this );
diff --git a/src/framework/mlt_tractor.h b/src/framework/mlt_tractor.h
index d8cff554..b9e606ff 100644
--- a/src/framework/mlt_tractor.h
+++ b/src/framework/mlt_tractor.h
@@ -31,6 +31,9 @@ extern mlt_properties mlt_tractor_properties( mlt_tractor self );
 extern mlt_field mlt_tractor_field( mlt_tractor self );
 extern mlt_multitrack mlt_tractor_multitrack( mlt_tractor self );
 extern int mlt_tractor_connect( mlt_tractor self, mlt_service service );
+extern void mlt_tractor_refresh( mlt_tractor self );
+extern int mlt_tractor_set_track( mlt_tractor self, mlt_producer producer, int index );
+extern mlt_producer mlt_tractor_get_track( mlt_tractor self, int index );
 extern void mlt_tractor_close( mlt_tractor self );
 
 #endif
-- 
2.39.2